Die punch



July 6, 1943. 1 A sMlTH 2,323,755

DIE PUNCH Filed June 5, 1942 lll/11 :fl/ll l,

Patented July 6, 1943 I DIE PUNCH Jacob A. smith, chicago, to Claude A.A Benj Ill., assigner of one-half amin, Chicago, Ill.

Application June 5, 1942, Serial No. 445,841

9 Claims. @LIM-124) :This invention relates to die punches and more particularly to punches adapted to be used with piercing dies and to means to remove the punches vfor repair or replacement.

Heretofore die punches have been supported in piercing dies by rigidly connecting the punch to the die pad. In the event of damage to the punch, it was necessary to remove the entire die pad for replacement of the damaged punch, .It has also been proposed removably to support punches in holders connected to the die pad in which constructions a relatively loose mounting of the punch has `been required resulting in a loss of accuracy.-

the quills. By this'construction, the quills may be accuratelyrigidly and permanently mounted in the die pads while the punches lare securely and accurately mounted in the quills.

In order to remove a punch from its quill in the event of damage to the punch, a tool is provided comprising an elongated tube- I9 having a transverse bore VEl therein to receive .the quill. The tube I 9 maybe made of any desired length s o that an operator can reach into a large die to replace a punch therein without difficulty- A wedgeZ is slida-ble in the tube I9 and terminates in a flattened Wedge shape portion to enter the slots I8 and engage the upper end of the shank'.

One of the objects of the present invention is l5 The wedge may be held against rotation in the ISO Provide a die punch accurately supported on a tube by means such es e threaded plug as in the die pad aind readily removable therefrom for. re- Side of the tube engageablewith the Vmdgtt.` placemen The tube I 9 is secured to a block formedof side Another object of the invention is to provide a mates 2d Connected by end mates 25 and gg The tool for removing diepunches operable at a dis- 20 Side and end plates may be. integrally or sepatance from the punch. I. rately formed but preferably each side plate is ntler obJect of dthe rnvelilitionhils todprovlde integral with one of the end plates so that 'tle a 00 or removing ie pun@ es W Ch 09S not block is lorrnedbyv two L-sh'aped pieces. e place a Strain 0n the punch holder or quill. plete 2 5 is formed with e bore tereeeive the tube Stm another Object of the invention S t0 pro- 25 which may beheld against movement outwardly vide a tool for removing die punches which is Of the block by a' shoulder 27 engaging the end Operable quickly and easily yet which develops a plate. The wedge 22 extends beyond the shoulder high degree of force to remove the punch from 21 and terminates in an enlarged end 2g Whig? the holder' is urged inwardly of the block by a coil spring A further object of the invention is to provide The head 2g on the Wedge engages a Cam gg a tooor removgg a 'gie mme? lncludfg 112163115 30 shown as formed br an enlarged cyirllrica boss provi mg 3 mp1 m0 lon 0 a e up s ac an supported on pins 2 and having a a ene cam high leverage motion to provide the nal operatface e3 on one Side thereof to engage the head ing movement' A The pins 32 are slidably and. rotatably supported flle abovetand qflhr obietsnnfdoadvtgltcgs 35 in elongated slots ed in the eidg pieies 2da lend 0 e mven-1on W1 e app te r m, e ,O` cam is adapted to be turned y a an ever lowing 'descmpton when. read m cpnnectlon Wlth secured thereto. The position of the pins in the theaccompanymg qrawmgf m Whlch` h t slots may be determmed by a screw mechanism Flgure l 1.5 a' parlal seguo? of a punc mmm for advancing thel cam to take up loose motion. mgmb0dy1pg-themventlort 40 This mechanism, as shown, comprises a screw 36 msignlgh smclfde elevatlon of a tool for re` threaded into an end plate 26 and. having a knurled knob 3l at its outer end.

Flgures 3 4 and 5 are secmolilal lews of the In operation, when it is desired to remove a tolmlstla'tmg lts nnlner userzh 1m 6 6 punch from a quill, the opening 2I in the tube of Fglet 1s a par la' sec lon O` e e 45 I9 is slipped over the quill with the parts 1n Figure 1 mus-trenes e die including e bleek in fugstlglgg; dflitain'; ufbethl on Whlcha' pad- H 1S mounted' The pad 1s quin uni-.i1 the end of the wedge 22 is aligned with formed with a series of holes I 2 to receive punch the slot I8 and the screw 36 1s then turned until holders or quills I3 which may be accurately r0 the wedge engages the end of the shank I6 as located 1n the holes I2 and held therein by en d th larged upper end portions M shown 1n Figure 4. During this movement, e cam is not turned but is moved bodily in the The qu1lls I3 are formed at their outer ends .th with tapered openings I5 to receive tapered blOCk by engagement Of the SCTSW 35 theleWl Shanks it of punches l1, The upper ends of Thereafter, the lever t5 may be swung counterthe Shanks I6 extend into transverse slots I8 in 55 clockwise as shown 1n Flgure 5 to force the wedge 22 forwardly with a high leverage. This final increment of movement which may be relatively small will cause the wedge to move the shank downwardly in the quill to loosen it therefrom so that it may drop out freely.

In addition to the ease of removal and replacement of punches as explained above, the present construction has the additional advantage of economy of manufacture. Because of the fact that only the small punches l1 need be made of high grade expensive steels while the quills may be made of low grade less expensive materials the cost of punches over conventional punches which had to be made of high grade steel throughout is materially reduced. Furthermore, since only the small punch part I1 need be replaced in the event of wear and breakage, the cost of maintaining the punches in proper operation is kept at a minimum.

While one embodiment of the invention has been shown and described in detail, it will be understood that it is illustrative only and is not intended as a definition of the scope of the invention, reference being had for this purpose to the appended claims.

What is claimed is:

l. A tool for use with a tool holder having a pad, comprising a quill carried by the pad having a tapered opening at its outer end and a transverse slot intersecting the opening, a tool having a tapered shank fitting in the opening with the end of the shank extending into the slot, in combination with a tool for removing the punch from the quill `comprising an elongated supporting member to engage and hold the quill and a wedge slidable longitudinally of the supporting member to enter the slot and force the tool from the quill.

2. A die punch for use with a die having a pad, comprising a quill carried by the pad having a tapered opening at its outer end and a transverse slot intersecting the opening, a punch having a tapered shank fitting in the opening with the end of the shank extending into the slot, in combination with a tool for removing the punch from the quill comprising an elongated tube having a transverse opening to receive the quill, a wedge slidable in the tube to enter the slot and engage the end of the punch shank, and means to move the wedge in the tube.

3. In a die punch having a quill with a tapered end opening to receive a tapered shank on a punch, a punch removing tool comprising an elongated support to engage the quill, a wedge slidable longitudinally of the support to enter a slot in the quill and engage the punch shank, low leverage means to move the wedge into engagement with the shank, and higher leverage means thereafter to give the wedge an additional increment of movement.

4. In a die punch having a quill with a tapered end opening to receive a tapered shank on a punch, a punch removing tool comprising an elongated support to engage the quill, a Wedge slidable longitudinally of the support to enter a slot in the quill and engage the punch shank, a cam movable relative to the support to engage and move the Wedge, and some means to move the cam. Y

5. In a die punch having a quill with a tapered end opening to receive a tapered shank on a punch, a punch removing tool comprising an elongated tube having a transverse opening therein to receive the quill, a wedge slidable in the tube to enter a slot in the quill and engage the punch shank, and means connected to the tube to engage and move the wedge therein.

6. In a die punch having a quill with a tapered end opening to receive a tapered shank on a punch, a punch removing tool comprising an elongated tube having a transverse opening therein to receive the quill, a wedge slidable in the tube to enter a slot in the quill and engage the punch shank, low leverage means to move the wedge in the tube until it engages the shank, and higher leverage means thereafter to give the wedge an additional increment of movement.

'7. In a die punch having a quill with a tapered end opening to receive a tapered shank on a punch, a punch removing tool comprising an elongated tube having a transverse opening therein to receive the quill, a wedge slidable in the tube to enter a slot in the quill and engage the punch shank, a block connected to the tube, a cam rotatably and slidably carried by the block and engaging the wedge to move it, land a screw in the block engaging the cam to slide it in the block.

8. A tool holder including a quill having a tapered opening at its outer end and a transverse slot intersecting the opening, a tool having a tapered shank fitting in the opening with the end of the shank extending into the slot, in combination with means for removing the tool from the quill comprising an elongated supporting member to engage and hold the quill and a wedge slidable longitudinally of the supporting member to enter the slot and force the tool from the quill.

9. A tool holder including a quill having a tapered opening at its outer end and a transverse slot intersecting the opening, a tool having a tapered shank fitting in the opening with the end of the shank extending into the slot, in combination with means for removing the tool from the quill comprising an elongated tube having a transverse opening to receive the quill, a wedge slidable in the tube to enter the slot in the quill and engage the end of the tool shank, and means to move the wedge in the tube.

JACOB A. SMITH. 

